JPS598741B2 - Vacuum tube type heat collector - Google Patents

Description

Detailed Description of the Invention The present invention relates to a vacuum tube type heat collector in which a heat pipe is inserted into one end of a transparent tube such as a glass tube, the insertion end is sealed, and then the inside of the transparent tube is evacuated. The present invention relates to a vacuum tube type heat collector with a protection mechanism that can prevent the transparent outer tube from bursting due to the heat medium sealed in the heat pipe when the heat pipe is unexpectedly damaged.

As shown in FIG. 1, an example of a vacuum tube type heat collector using a heat pipe is a heat pipe 4 in which a heat medium such as fluorocarbon is sealed in a sealed metal tube 3 having a heat radiation part 1 and a heat collection part 2.
A heat collecting plate 5 for radiant heat is fixed to the heat pipe 4, the heat collecting part 2 of the heat pipe 4 and the heat collecting plate 5 are inserted into a transparent outer tube 6 such as a glass tube, and the insertion side is hermetically sealed. By evacuating the inner space 8 of the transparent outer tube using the radiant heat, the heat medium in the heat collecting section 2 is efficiently vaporized by radiant heat, and transferred to the heat radiating section 1 where it is condensed to collect heat. be.

Note that 9 is a support fitting that supports the heat pipe 4 within the outer tube.

Therefore, when using heat pipes to transfer heat, high-pressure operating types are less costly from a manufacturing standpoint than low-pressure operating types, but on the other hand, sealed pipes that enclose the heating medium are If there is a material defect in the heat medium, it will break or gas will leak when it is overheated and the pressure of the heat medium increases excessively, filling the vacuum transparent outer tube 6 into which the heat collecting part 2 of the Heat Hype is inserted. There is a risk that the transparent outer tube 6 will rupture.

In view of the above-mentioned points, the present invention, when the heat medium sealed in the heat pipe leaks into the transparent vacuum outer tube and the pressure inside the outer tube rises, the leaked gas is promptly released into the atmosphere, and the transparent outer tube has an excessively high temperature. The purpose is to prevent pressure from being applied.

In order to achieve the above object, the vacuum tube type heat collector of the present invention encloses a heat medium in a sealed tube, vaporizes the heat medium in the heat collecting part,
A heathype is inserted into the vacuum transparent outer tube so that the heat obtained in the heat collection section is transferred to the heat radiation section by condensing it in the heat radiation section. The structure is equipped with a device that releases the gas leaking into the outer tube into the atmosphere without destroying the transparent outer tube, and has sufficient pressure resistance against external pressure and prevents pressure from rising inside. The device is equipped with a device that operates with a small pressure increase.

In the embodiments shown in FIGS. 2 and 3, an end plate 10 that seals one end of a transparent outer tube 6 has a protective function. By using the end plate 10 of FIG. 3, the inner space 8 of the transparent outer tube has sufficient strength against the external pressure when it is evacuated, while the pressure inside the inner space 8 of the outer tube increases. In this case, by using an end plate 10' having a concave R-curved surface on the outside so that it breaks before the transparent outer tube 6 breaks, the heat medium gas sealed in the heat pipe 4 leaks into the inner space 8 of the outer tube. In some cases, the heat medium can be safely discharged to the outside of the transparent outer tube 6 without destroying it.

In the embodiment shown in FIG. 4, an airtight adhesive with low tensile strength is used for the adhesive part 12 between the transparent outer tube 6 and the end plate 10. When the heat transfer gas leaks and the pressure in the transparent outer tube inner space 8 increases, the end plate 10'' comes off from the outer tube 6 to prevent the outer tube 6 from being destroyed.

For this reason, the adhesive part 12 is formed with adhesive in a shape that makes it easy for the end plate 10 to come off, or the adhesive is formed in such a way that the adhesive easily peels off when the internal pressure of the end plate 10'' is applied. It is preferable to use it.

As described above, in the vacuum tube type heat collector according to the present invention, the heat pipe is built into the transparent outer tube so that the heat collecting part is located inside the vacuum outer tube and the heat radiating part is located outside. When the sealed heat medium leaks into the transparent vacuum outer tube and the pressure inside the outer tube rises, the leaked gas is immediately released into the atmosphere, preventing excessive pressure from being applied to the transparent outer tube, thereby preventing heat hype. A hard transparent body made of a brittle material such as glass can be used as the material of the outer tube of a heat collector that is used in combination with a transparent vacuum outer tube, with a greater degree of freedom in designing the strength against internal pressure. and
In addition, the selection of the heat medium for the heat pipe can be determined separately from the pressure resistance of the vacuum transparent outer tube, making it possible to manufacture a vacuum tube type heat collector by combining the most preferable vacuum transparent outer tube and heat pipe. It is meant to be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a vacuum tube type heat collector, and FIGS. 2 to 4 are main part sectional views showing an embodiment of a protection mechanism for a vacuum tube type heat collector according to the present invention. 1... Heat dissipation section, 2... Heat collection section, 4...
... Heat pipe, 5 ... Heat collection plate, 6 ...
...Transparent outer tube, 8...Outer tube inner space, io, i
o', 1o... End plate.

Claims (1)

[Claims] 1. A heat pipe in which a heat medium is sealed in a sealed tube, the heat medium is vaporized in a heat collecting part, and condensed in a heat radiating part, so that the heat obtained in the heat collecting part is transferred to the heat radiating part. In addition to being inserted into the tube, the vacuum transparent outer tube is equipped with a device for releasing gas leaked into the transparent outer tube into the atmosphere without destroying the transparent outer tube when the internal pressure of the outer tube increases. Vacuum tube type heat collector.